Had one back in the late '80s and early '90s -- Starbuck was his name. Sooo sweet and patient with me. Bobtail dogs (or Old English Sheepdogs) generally weigh 70 to 100 pounds(45 kg); females, 60 to 80 pounds. They stand around 22 inches at the withers. Their long coats can be any shade of gray, grizzle, blue, or blue merle, with optional white markings. The undercoat is water resistant. The Old English Sheepdog's abundant coat is an effective insulator in both hot and cold weather